<!DOCTYPE html>
<html lang="en">

	<head>
		<meta charset="UTF-8">
		<title>第一个three.js文件_WebGL三维场景</title>
		<style>
			body {
				margin: 0;
				overflow: hidden;
				/* 隐藏body窗口区域滚动条 */
			}
		</style>
		<!--引入three.js三维引擎-->
		<script src="http://www.yanhuangxueyuan.com/versions/threejsR92/build/three.js"></script>
		<script src='./JS/OrbitControls.js'></script>
		<!-- <script src="./three.js"></script> -->
		<!-- <script src="http://www.yanhuangxueyuan.com/threejs/build/three.js"></script> -->
	</head>

	<body>
		<script>
			// 创建场景对象Scene
			var scene = new THREE.Scene();
			
			
			var geometry = new THREE.BoxGeometry(100, 100, 100); //创建一个立方体几何对象Geometry
			
			geometry.faces.pop();
			geometry.faces.pop();
			geometry.faces.shift();
			geometry.faces.shift();
			
			// 遍历几何体的face属性
			geometry.faces.forEach(face => {
			  // 设置三角面face三个顶点的颜色
			  face.vertexColors = [
			    new THREE.Color(0xffff00),
			    new THREE.Color(0xff00ff),
			    new THREE.Color(0x00ffff),
			  ]
			});
			var material = new THREE.MeshBasicMaterial({
			  // color: 0x0000ff,
			  vertexColors: THREE.FaceColors,
			  side: THREE.DoubleSide, //两面可见
			  // wireframe:true,//线框模式渲染
			}); //材质对象Material
			var mesh = new THREE.Mesh(geometry, material); //网格模型对象Mesh
			scene.add(mesh)
			
			// 辅助三维坐标系AxisHelper
			var axisHelper = new THREE.AxisHelper(250);
			scene.add(axisHelper);
			
			
			/**
			 * 光源设置
			 */
			//点光源
			

			//环境光		境光颜色与网格模型的颜色进行RGB进行乘法运算
			var ambient = new THREE.AmbientLight(0xffffff);
			var ambient = new THREE.AmbientLight(0x444444);
			scene.add(ambient);
			
			// console.log(scene.children)
			
			
			
			/**
			 * 相机设置
			 */
			var width = window.innerWidth; //窗口宽度
			var height = window.innerHeight; //窗口高度
			var k = width / height; //窗口宽高比
			var s = 200; //三维场景显示范围控制系数，系数越大，显示的范围越大
			//创建相机对象
			var camera = new THREE.OrthographicCamera(-s * k, s * k, s, -s, 1, 1000);
			camera.position.set(200, 300, 200); //设置相机位置
			camera.lookAt(scene.position); //设置相机方向(指向的场景对象)
			/**
			 * 创建渲染器对象
			 */
			var renderer = new THREE.WebGLRenderer();
			renderer.setSize(width, height); //设置渲染区域尺寸
			renderer.setClearColor(0xb9d3ff, 1); //设置背景颜色
			document.body.appendChild(renderer.domElement); //body元素中插入canvas对象
			//执行渲染操作   指定场景、相机作为参数
			// renderer.render(scene, camera);

			let T0 = new Date(); //上次时间
			let render = () => {
				let T1 = new Date(); //本次时间
				let t = T1 - T0; //时间差
				T0 = T1; //把本次时间赋值给上次时间
				// requestAnimationFrame(render);
				renderer.render(scene, camera); //执行渲染操作
				// mesh.rotateY(0.001 * t); //旋转角速度0.001弧度每毫秒
				// mesh.rotateY(0.001);
			}
			render();

			var controls = new THREE.OrbitControls(camera, renderer.domElement); //创建控件对象
			// console.log(controls)
			controls.addEventListener('change', render); //监听鼠标、键盘事件
			
			
			console.log(geometry)
			console.log('几何体顶点位置数据',geometry.vertices);
			console.log('三角行面数据',geometry.faces)
			// console.log('几何体顶点位置数据',geometry.attributes.position);
			console.log('几何体索引数据',geometry.index);
		</script>
	</body>
</html>
